First, check your last bill. Look for the phrase “end date” or “contract expiry.” If that date is in the past, you’re likely overpaying. Second, use a comparison site like MoneySavingExpert’s mobile tool or Compare the Market. It takes three minutes—less time than finding a parking spot at Waitrose. Third, pick up the phone and call your provider. Say this magic sentence: “I’d like to switch to a sim-only deal for your cheapest 30-day plan.”
If they offer you a “loyalty discount” (they often do), take it—but only if it’s at least 30% cheaper than your current bill. Otherwise, walk. Remember: sim-only deals now include 5G, unlimited calls, and 10GB of data for as little as £10 a month. Yes, £10. That’s less than a Deliveroo feast.
Martin Lewis warns millions of phone customers over 'massive rip off
Fun little fact: in 2026, Virgin Mobile tried to charge a customer £60 a month for a plan they could have gotten for £18. The customer only discovered the error after Martin Lewis tweeted about it. Switching saved them £504 a year—enough for a spontaneous trip to Lisbon or a new laptop.
The cultural elephant in the room: we’re all procrastinators
Why do we let this happen? Inertia. It’s the same reason we stay in a bad relationship for three extra months or keep a gym membership we never use. The psychology is real: changing phone plans feels like work, like filing taxes or deciding on a dinner plan with a picky friend. But it’s not. It’s a 10-minute task. Set a recurring calendar note for every 24 months titled “Check phone bill—stop being a financial doormat.”
Another reason: we think loyalty earns us something. Nope. In the telecom world, loyalty is a liability. Providers literally call it “harvesting” when they let loyal customers overpay. Think of it like dating someone who forgets your birthday every year—then charges you for the pleasure.
